Experiment 4

The view from inside one of our microcosms.

Experimental Overview

Full experimental information, including previous experiments and timeline, can be found at the MCP website

RNA-SIP protocol can be found here on github.

Raw files used in this page can be found here on github.

Overview of experimental design. We first innoculated six chemostat and batch cultures with < 400 uM Siders Pond microbial community. These cultures had 5 different carbon substrates, with concentrations that ensured there was the same available Gibbs Free Energy from each carbon substrates One of those six cultures contained all the five carbon substrates with natural abundances of 12C. In the remaining six cultures, one of the carbon substrates was labelled with 13C, while the other four remained unlabelled. Therefore, five of the six cultures were 20% labelled in 13C. We then extracted the RNA, performed RNA-SIP fractionation, and are sequencing both the eukaryotic and bacterial community to identify trophic cascades.

library(phyloseq)
library(reshape2)
library(tidyverse)
library(vegan)
library(HTSSIP)
library(ape)
library(CoDaSeq)
library(philr)
library(ggtree)
library(cowplot)
library(ggplot2)
library(viridis)
library(phytools)

State Data

Gas Data

Full gas data for the entire experiment can be found at the Experiment 4 highcharts website

x<-read.csv(file='/Users/oliviaahern/Documents/R/Exp4/22Apr22/Exp4_Chemostat.csv',header=TRUE)
timec=x$Time..d.
mc1cO2c=x$CO2.MC1....
mc2cO2c=x$CO2.MC2....
mc3cO2c=x$CO2.MC3....
mc4cO2c=x$CO2.MC4....
mc5cO2c=x$CO2.MC5....
mc6cO2c=x$CO2.MC6....
mc1O2c=x$O2.MC1....
mc2O2c=x$O2.MC2....
mc3O2c=x$O2.MC3....
mc4O2c=x$O2.MC4....
mc5O2c=x$O2.MC5....
mc6O2c=x$O2.MC6....


x<-read.csv(file='/Users/oliviaahern/Documents/R/Exp4/22Apr22/Exp4_Batch.csv',header=TRUE)
time=x$Time..d.

mc1cO2=x$CO2.MC1....
mc2cO2=x$CO2.MC2....
mc3cO2=x$CO2.MC3....
mc4cO2=x$CO2.MC4....
mc5cO2=x$CO2.MC5....
mc6cO2=x$CO2.MC6....
mc1O2=x$O2.MC1....
mc2O2=x$O2.MC2....
mc3O2=x$O2.MC3....
mc4O2=x$O2.MC4....
mc5O2=x$O2.MC5....
mc6O2=x$O2.MC6....
{
par(mfrow=c(2,2),mar=c(5,5,1,1))
layout(matrix(c(1,2,2,3,4,4), nrow = 2, ncol = 3, byrow = TRUE))

plot(time,mc1O2, type='l',pch=21, col='gray70',ylim=c(20.8,21.2),
     xlab="Time (days)", lwd=1, cex.axis=1.5,cex.lab = 1.5,
     ylab="Oxygen (%)", yaxt='n')
axis(2, at=c(20.8, 21, 21.2), cex.axis=1.5)
lines(time, mc2O2, type='l', pch=21, col='#a44f9a')
lines(time, mc3O2, type='l', pch=21, col='#6870c8')
lines(time, mc4O2, type='l', pch=21, col='#56ae6c')
lines(time, mc5O2, type='l', pch=21, col='#af953c')
lines(time, mc6O2, type='l', pch=21, col='#ba4a4f')

plot(timec,mc1O2c, type='l',pch=21, col='gray70',ylim=c(20.5,21),
     xlab="Time (days)", lwd=1,cex.axis=1.5,cex.lab = 1.5,
     ylab="Oxygen (%)", yaxt="n")
axis(2, at=c(20.6, 20.8,21), cex.axis=1.5)
lines(timec, mc2O2c, type='l', pch=21, col='#a44f9a')
lines(timec, mc3O2c, type='l', pch=21, col='#6870c8')
lines(timec, mc4O2c, type='l', pch=21, col='#56ae6c')
lines(timec, mc5O2c, type='l', pch=21, col='#af953c')
lines(timec, mc6O2c, type='l', pch=21, col='#ba4a4f')

plot(time,mc1cO2, type='l',pch=21, col='gray70',ylim=c(0,0.2),
     xlab="Time (days)", lwd=1,cex.axis=1.5,cex.lab = 1.5,
     ylab="Carbon Dioxide (%)", yaxt='n')
axis(2, at=c(0,0.1,0.2), cex.axis=1.5)
lines(time, mc2cO2, type='l', pch=21, col='#a44f9a')
lines(time, mc3cO2, type='l', pch=21, col='#6870c8')
lines(time, mc4cO2, type='l', pch=21, col='#56ae6c')
lines(time, mc5cO2, type='l', pch=21, col='#af953c')
lines(time, mc6cO2, type='l', pch=21, col='#ba4a4f')

plot(timec,mc1cO2c, type='l',pch=21, col='gray70',ylim=c(0.18,0.3),
     xlab="Time (days)", lwd=1,cex.axis=1.5,cex.lab = 1.5,
     ylab="Carbon Dioxide (%)", yaxt="n")
axis(2, at=c(0.2, 0.25,0.3), cex.axis=1.5)
lines(timec, mc2cO2c, type='l', pch=21, col='#a44f9a')
lines(timec, mc3cO2c, type='l', pch=21, col='#6870c8')
lines(timec, mc4cO2c, type='l', pch=21, col='#56ae6c')
lines(timec, mc5cO2c, type='l', pch=21, col='#af953c')
lines(timec, mc6cO2c, type='l', pch=21, col='#ba4a4f')
}

Atomic % 13C

Atomic % 13C was measured from dried GFF filters. Calculations and measurements were carried out by the MBL Stable Isotope

read=read.csv(file="/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/SIP_Spins/atomic_C_30Aug22.csv",header=T)

read1=subset(read, B_C=="B")

MC1=subset(read1, MC=="MC1")
MC2=subset(read1, MC=="MC2")
MC3=subset(read1, MC=="MC3")
MC4=subset(read1, MC=="MC4")
MC5=subset(read1,MC=="MC5")
MC6=subset(read1,MC=="MC6")

read2=subset(read, B_C=="C")

MC1c=subset(read2, MC=="MC1")
MC2c=subset(read2, MC=="MC2")
MC3c=subset(read2, MC=="MC3")
MC4c=subset(read2, MC=="MC4")
MC5c=subset(read2,MC=="MC5")
MC6c=subset(read2,MC=="MC6")

{par(mar=c(5,5,1,1), mfrow=c(1,2))
plot(MC1$TP,MC1$Balanced_Atomic_.13C, type='o',  ylim=c(0,30),pch=21,bg='gray70',
     xlab="Time (days)", ylab="Atomic %13C", cex=1.5, cex.lab=1.4)
lines(MC1$TP, MC2$Balanced_Atomic_.13C, type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.5)
lines(MC1$TP, MC3$Balanced_Atomic_.13C, type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.5)
lines(MC1$TP, MC4$Balanced_Atomic_.13C, type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.5)
lines(MC1$TP, MC5$Balanced_Atomic_.13C, type="o", col="#af953c", bg="#af953c", pch=21,cex=1.5)
lines(MC1$TP, MC6$Balanced_Atomic_.13C, type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.5)
legend('topleft',legend=c("MC1-C12", "MC2-Met", "MC3-Eth", "MC4-Ace",
                          "MC5-Glu", "MC6-Xyl"), bty='n', pch =21,
       pt.bg=c("gray70", "#a44f9a", "#6870c8", "#56ae6c", "#af953c", "#ba4a4f"))


plot(MC1c$TP,MC1c$Balanced_Atomic_.13C, type='o',  ylim=c(0,30),pch=21,bg='gray70',
     xlab="Time (days)", ylab="Atomic %13C", cex=1.5, cex.lab=1.4)
lines(MC1c$TP, MC2c$Balanced_Atomic_.13C, type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.5)
lines(MC1c$TP, MC3c$Balanced_Atomic_.13C, type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.5)
lines(MC1c$TP, MC4c$Balanced_Atomic_.13C, type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.5)
lines(MC1c$TP, MC5c$Balanced_Atomic_.13C, type="o", col="#af953c", bg="#af953c", pch=21,cex=1.5)
lines(MC1c$TP, MC6c$Balanced_Atomic_.13C, type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.5)
legend('topleft',legend=c("MC1-C12", "MC2-Met", "MC3-Eth", "MC4-Ace",
                          "MC5-Glu", "MC6-Xyl"), bty='n', pch =21,
       pt.bg=c("gray70", "#a44f9a", "#6870c8", "#56ae6c", "#af953c", "#ba4a4f"),ncol=2)

}

Atomic % 13C + POC

Atomic % 13C was measured from dried GFF filters. Calculations and measurements were carried out by the MBL Stable Isotope. POC was normalized to the amount of water filtered through each sample.

{#par(mar=c(5,5,1,1), mfrow=c(2,2))
  layout(matrix(c(1,2,2,3,4,4), nrow = 2, ncol = 3, byrow = TRUE))
  
  plot(MC1$TP,MC1$Balanced_Atomic_.13C, type='o',  ylim=c(0,30),pch=21,bg='gray70',
       xlab="Time (days)", ylab="Atomic %13C", cex=1.2, cex.lab=1.2,
       yaxt='n')
  axis(2,at=c(0,10,20,30))
  lines(MC1$TP, MC2$Balanced_Atomic_.13C, type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.2)
  lines(MC1$TP, MC3$Balanced_Atomic_.13C, type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.2)
  lines(MC1$TP, MC4$Balanced_Atomic_.13C, type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.2)
  lines(MC1$TP, MC5$Balanced_Atomic_.13C, type="o", col="#af953c", bg="#af953c", pch=21,cex=1.2)
  lines(MC1$TP, MC6$Balanced_Atomic_.13C, type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.2)
 # legend('topleft',legend=c("MC1-C12", "MC2-Met", "MC3-Eth", "MC4-Ace",
  #                          "MC5-Glu", "MC6-Xyl"), bty='n', pch =21,
  #       pt.bg=c("gray70", "#a44f9a", "#6870c8", "#56ae6c", "#af953c", "#ba4a4f"))
  
  
  plot(MC1c$TP,MC1c$Balanced_Atomic_.13C, type='o',  ylim=c(0,30),pch=21,bg='gray70',
       xlab="Time (days)", ylab="Atomic %13C", cex=1.2, cex.lab=1.2,
       yaxt='n')
  axis(2,at=c(0,10,20,30))
  lines(MC1c$TP, MC2c$Balanced_Atomic_.13C, type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.2)
  lines(MC1c$TP, MC3c$Balanced_Atomic_.13C, type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.2)
  lines(MC1c$TP, MC4c$Balanced_Atomic_.13C, type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.2)
  lines(MC1c$TP, MC5c$Balanced_Atomic_.13C, type="o", col="#af953c", bg="#af953c", pch=21,cex=1.2)
  lines(MC1c$TP, MC6c$Balanced_Atomic_.13C, type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.2)
  legend('topleft',legend=c("MC1-C12", "MC2-Met", "MC3-Eth", "MC4-Ace",
                            "MC5-Glu", "MC6-Xyl"), bty='n', pch =21,
         pt.bg=c("gray70", "#a44f9a", "#6870c8", "#56ae6c", "#af953c", "#ba4a4f"),ncol=2)

  
  plot(MC1$TP,MC1$POC.._M., type='o',  ylim=c(0,500),pch=21,bg='gray70',
       xlab="Time (days)", ylab="POC (uM)", cex=1.2, cex.lab=1.2,
       yaxt='n')
  axis(2,at=c(0,250,500))
  lines(MC1$TP, MC2$POC.._M., type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.2)
  lines(MC1$TP, MC3$POC.._M., type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.2)
  lines(MC1$TP, MC4$POC.._M., type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.2)
  lines(MC1$TP, MC5$POC.._M., type="o", col="#af953c", bg="#af953c", pch=21,cex=1.2)
  lines(MC1$TP, MC6$POC.._M., type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.2)

  
  plot(MC1c$TP,MC1c$POC.._M., type='o',  ylim=c(0,1100),pch=21,bg='gray70',
       xlab="Time (days)", ylab="POC (uM)", cex=1.2, cex.lab=1.2,
       yaxt='n')
  axis(2,at=c(0,500,1000))
  lines(MC1c$TP, MC2c$POC.._M., type="o", col="#a44f9a", bg="#a44f9a", pch=21,cex=1.2)
  lines(MC1c$TP, MC3c$POC.._M., type="o", col="#6870c8", bg="#6870c8", pch=21,cex=1.2)
  lines(MC1c$TP, MC4c$POC.._M., type="o", col="#56ae6c", bg="#56ae6c", pch=21,cex=1.2)
  lines(MC1c$TP, MC5c$POC.._M., type="o", col="#af953c", bg="#af953c", pch=21,cex=1.2)
  lines(MC1c$TP, MC6c$POC.._M., type="o", col="#ba4a4f", bg="#ba4a4f", pch=21,cex=1.2)
  
  
  }

SIP Spins

SIP gradients were setup using a CsTFA gradient centered at ~1.80 g/mL, formamide, and between 750-500 ng of RNA. Full experimental protocol can be foound on my github page.

Standard deviation between SIP runs (as of Sept 9th, 2022) were:

• Lueders BD and correction factor: 0.004110266 +/- 0.001662171 g/mL (~40% standard deviation)
• Buckley BD and correction factor: 0.00309178 +/- 0.001010027 g/mL (~33% standard deviation)

C13 peak was about 0.016 g/mL higher than the 13C peak.

Batch

read=read.csv('/Users/oliviaahern/Documents/R/Exp4/25Aug22/qpcr_6Oct22.csv',header=T)

Ratio of Maximum Quantity vs. Buckley Buoyant Density

Average peak 12C density for MC1-C12

• Lueders BD and correction factor: 1.7811 +/- 0.0090 g/mL
• Buckley BD and correction factor: 1.7860 +/- 0.0023 g/mL

qpcr=read.csv(file='/Users/oliviaahern/Documents/R/Exp4/25Aug22/qpcr_6Oct22.csv',
              header=T)
# dim(qpcr)
qpcr_sub=subset(qpcr, Buckley > 1.74)

make_bar_relabun <- function(df, selection){
  df_out <- df %>% 
    filter(MC %in% c("MC1",selection))
  ggplot(df_out, aes(x = Buckley, y = qPCR_RMAX)) +
    scale_fill_manual(values=colls) +
    scale_colour_manual(values=colls) +
    facet_grid(~TP, scale='free_x', space="free", shrink=TRUE) +
    geom_point(aes(colour=MC, 
                   fill = MC), size=1.3) + 
    geom_line(aes(colour=MC)) + 
    labs(x="Buoyant Density (g/mL)", y = "Ratio of Maximum Quantity") +
    theme_bw() +  scale_x_continuous(limits = c(1.76, 1.83)) +
    theme(axis.text = element_text(color ='black',size=6, hjust=1,vjust=1),
          axis.text.x=element_text(size=6, angle=90),
          axis.title = element_text(color='black',face='bold',size=8),
          legend.position = "right",
          panel.grid=element_blank(),
          legend.text = element_text(size=8),
          legend.key.size = unit(0.25,'cm'),
          strip.text.x = element_text(
            size = 10, color = "black", face = "bold"),
          strip.background = element_rect(
            color="gray80", fill="gray97", size=1, linetype="solid"),
          panel.spacing = unit(0.05, "lines")
    )
}


colls=c('gray50',"#a44f9a")
m2=make_bar_relabun(qpcr_sub, "MC2")
mm=make_bar_relabun(qpcr_sub, "MC2")

colls=c('gray50',"#6870c8")
m3=make_bar_relabun(qpcr_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=make_bar_relabun(qpcr_sub, "MC4")
colls=c('gray50',"#af953c")
m5=make_bar_relabun(qpcr_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=make_bar_relabun(qpcr_sub, "MC6")
library(cowplot)
plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

Ratio of Maximum Quantity vs. Leuders Buoyant Density

qpcr_leud_rmax <- function(df, selection){
  df_out <- df %>% 
    filter(MC %in% c("MC1",selection))
  ggplot(df_out, aes(x = Corrected, y = qPCR_RMAX)) +
    scale_fill_manual(values=colls) +
    scale_colour_manual(values=colls) +
    facet_grid(~TP, scale='free_x', space="free", shrink=TRUE) +
    geom_point(aes(colour=MC, 
                   fill = MC), size=1.3) + 
    geom_line(aes(colour=MC)) + 
    labs(x="Buoyant Density (g/mL)", y = "Ratio of Maximum Quantity") +
    theme_bw() +  scale_x_continuous(limits = c(1.76, 1.83)) +
    theme(axis.text = element_text(color ='black',size=6, hjust=1,vjust=1),
          axis.text.x=element_text(size=6, angle=90),
          axis.title = element_text(color='black',face='bold',size=8),
          legend.position = "right",
          panel.grid=element_blank(),
          legend.text = element_text(size=8),
          legend.key.size = unit(0.25,'cm'),
          strip.text.x = element_text(
            size = 10, color = "black", face = "bold"),
          strip.background = element_rect(
            color="gray80", fill="gray97", size=1, linetype="solid"),
          panel.spacing = unit(0.05, "lines")
    )
}


colls=c('gray50',"#a44f9a")
m2=qpcr_leud_rmax(qpcr_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_leud_rmax(qpcr_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_leud_rmax(qpcr_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_leud_rmax(qpcr_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_leud_rmax(qpcr_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

RNA Concentration vs. Buckley Buoyant Density

qpcr_buck_conc <- function(df, selection){
  df_out <- df %>% 
    filter(MC %in% c("MC1",selection))
  ggplot(df_out, aes(x = Buckley, y = qPCR_conc)) +
    scale_fill_manual(values=colls) +
    scale_colour_manual(values=colls) +
    facet_grid(~TP, scale='free_x', space="free", shrink=TRUE) +
    geom_point(aes(colour=MC, 
                   fill = MC), size=1.3) + 
    geom_line(aes(colour=MC)) + 
    labs(x="Buoyant Density (g/mL)", y = "RNA Concentration (ng/uL)") +
    theme_bw() +  scale_x_continuous(limits = c(1.76, 1.83)) +
    theme(axis.text = element_text(color ='black',size=6, hjust=1,vjust=1),
          axis.text.x=element_text(size=6, angle=90),
          axis.title = element_text(color='black',face='bold',size=8),
          legend.position = "right",
          panel.grid=element_blank(),
          legend.text = element_text(size=8),
          legend.key.size = unit(0.25,'cm'),
          strip.text.x = element_text(
            size = 10, color = "black", face = "bold"),
          strip.background = element_rect(
            color="gray80", fill="gray97", size=1, linetype="solid"),
          panel.spacing = unit(0.05, "lines")
    )
}


colls=c('gray50',"#a44f9a")
m2=qpcr_buck_conc(qpcr_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_buck_conc(qpcr_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_buck_conc(qpcr_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_buck_conc(qpcr_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_buck_conc(qpcr_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

RNA Concentration vs. Leuders Buoyant Density

qpcr_leud_conc <- function(df, selection){
  df_out <- df %>% 
    filter(MC %in% c("MC1",selection))
  ggplot(df_out, aes(x = Corrected, y = qPCR_conc)) +
    scale_fill_manual(values=colls) +
    scale_colour_manual(values=colls) +
    facet_grid(~TP, scale='free_x', space="free", shrink=TRUE) +
    geom_point(aes(colour=MC, 
                   fill = MC), size=1.3) + 
    geom_line(aes(colour=MC)) + 
    labs(x="Buoyant Density (g/mL)", y = "RNA Concentration (ng/uL)") +
    theme_bw() +  scale_x_continuous(limits = c(1.76, 1.83)) +
    theme(axis.text = element_text(color ='black',size=6, hjust=1,vjust=1),
          axis.text.x=element_text(size=6, angle=90),
          axis.title = element_text(color='black',face='bold',size=8),
          legend.position = "right",
          panel.grid=element_blank(),
          legend.text = element_text(size=8),
          legend.key.size = unit(0.25,'cm'),
          strip.text.x = element_text(
            size = 10, color = "black", face = "bold"),
          strip.background = element_rect(
            color="gray80", fill="gray97", size=1, linetype="solid"),
          panel.spacing = unit(0.05, "lines")
    )
}


colls=c('gray50',"#a44f9a")
m2=qpcr_leud_conc(qpcr_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_leud_conc(qpcr_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_leud_conc(qpcr_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_leud_conc(qpcr_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_leud_conc(qpcr_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

Chemostat RT-qPCR

Ratio of Maximum Quantity vs. Buckley Buoyant Density

qpcr_chemo=read.csv(file='/Users/oliviaahern/Documents/R/Exp4/Dec22/qpcr_chemostat.csv',
              header=T)
qpcr_chemo_sub=subset(qpcr_chemo, Buckley > 1.74)

colls=c('gray50',"#a44f9a")
m2=make_bar_relabun(qpcr_chemo_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=make_bar_relabun(qpcr_chemo_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=make_bar_relabun(qpcr_chemo_sub, "MC4")
colls=c('gray50',"#af953c")
m5=make_bar_relabun(qpcr_chemo_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=make_bar_relabun(qpcr_chemo_sub, "MC6")
library(cowplot)
plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

Ratio of Maximum Quantity vs. Leuders Buoyant Density

colls=c('gray50',"#a44f9a")
m2=qpcr_leud_rmax(qpcr_chemo_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_leud_rmax(qpcr_chemo_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_leud_rmax(qpcr_chemo_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_leud_rmax(qpcr_chemo_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_leud_rmax(qpcr_chemo_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

RNA Concentration vs. Buckley Buoyant Density

colls=c('gray50',"#a44f9a")
m2=qpcr_buck_conc(qpcr_chemo_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_buck_conc(qpcr_chemo_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_buck_conc(qpcr_chemo_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_buck_conc(qpcr_chemo_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_buck_conc(qpcr_chemo_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

RNA Concentration vs. Leuders Buoyant Density

colls=c('gray50',"#a44f9a")
m2=qpcr_leud_conc(qpcr_chemo_sub, "MC2")
colls=c('gray50',"#6870c8")
m3=qpcr_leud_conc(qpcr_chemo_sub, "MC3")
colls=c('gray50',"#56ae6c")
m4=qpcr_leud_conc(qpcr_chemo_sub, "MC4")
colls=c('gray50',"#af953c")
m5=qpcr_leud_conc(qpcr_chemo_sub, "MC5")
colls=c('gray50',"#ba4a4f")
m6=qpcr_leud_conc(qpcr_chemo_sub, "MC6")

plot_grid(m2,m3,m4,m5,m6,aligh='hv',ncol=1)

16S Community Data

These were sequenced on a 2x250 bp MiSeq run with Bacterial V4V5 primers 518F/926R at the Bay Paul Center

• Forward Primer (518F) CCAGCAGCYGCGGTAAN
• Reverse Primers (926R) CCGTCAATTCNTTTRAGT CCGTCAATTTCTTTGAGT CCGTCTATTCCTTTGANT (mixed 8:1:1)

Code

Below is the code that I made using tutorials from Sarah Hu’s github page

Where my code is in poseidon:

(base) [olivia.ahern@poseidon-l2 26Aug22]$ cd /vortexfs1/scratch/olivia.ahern/26Aug22
(base) [olivia.ahern@poseidon-l2 26Aug22]$ cat run_dada2.sh
    

My batch script. Note I had to make a consensus sequence for 926R.

#!/bin/bash
#SBATCH --partition=compute
#SBATCH --ntasks=1
#SBATCH --mem=20gb
#SBATCH --cpus-per-task=20
#SBATCH --time=10:35:00

module load anaconda/5.1
source activate qiime2-2018.8

echo finding sequnces
qiime tools import \
    --type 'SampleData[PairedEndSequencesWithQuality]' \
    --input-path manifest.txt \
    --output-path paired-end-demux.qza \
    --input-format PairedEndFastqManifestPhred33

echo trimming
qiime cutadapt trim-paired \
    --i-demultiplexed-sequences paired-end-demux.qza \
    --p-cores 18 \
    --p-front-f CCAGCAGCYGCGGTAAN \
    --p-front-r CCGTCNATTNNTTTNANT \
    --p-error-rate 0.4 \
    --p-overlap 3 \
    --o-trimmed-sequences paired-end-demux-trimmed.qza

echo merging and clustering
qiime dada2 denoise-paired \
    --i-demultiplexed-seqs paired-end-demux-trimmed.qza \
    --p-n-threads 20 \
    --p-trunc-q 2 \
    --p-trunc-len-f 220 \
    --p-trunc-len-r 190 \
    --p-max-ee 2 \
    --p-n-reads-learn 1000000 \
    --p-chimera-method consensus \
    --o-table ASVs3/asv_table.qza \
    --o-representative-sequences ASVs3/rep-seqs.qza \
    --o-denoising-stats ASVs3/stats-dada2.qza

echo classifying taxa
qiime feature-classifier classify-sklearn \
    --i-classifier ../21Oct21/tagseq-qiime2-snakemake/silva_all.qza \
    --i-reads ASVs3/rep-seqs.qza \
    --o-classification ASVs3/asv_tax_sklearn.qza

cd ASVs3
qiime tools export --input-path asv_table.qza \
    --output-path asv_table

biom convert -i asv_table/feature-table.biom -o asv_table/asv-table.tsv --to-tsv

qiime tools export  --input-path asv_tax_sklearn.qza --output-path asv_tax_dir

Input data

library(phyloseq)
x<-read.csv(file='/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/Sequences/asv-table.csv',header=TRUE,row.names=1)
OTU = otu_table(x, taxa_are_rows=T)
taxa<-read.csv(file="/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/Sequences/taxonomy.csv",header=TRUE,row.names=1)
t<-as.matrix(taxa)
tax2<-tax_table(t)
map<-import_qiime_sample_data("/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/Sequences/map_exp4.txt")
tree=read.tree('/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/Sequences/tree.nwk')
phyo = phyloseq(OTU, tax2,map,tree)
phyo

## phyloseq-class experiment-level object
## otu_table()   OTU Table:         [ 2102 taxa and 96 samples ]
## sample_data() Sample Data:       [ 96 samples by 10 sample variables ]
## tax_table()   Taxonomy Table:    [ 2102 taxa by 8 taxonomic ranks ]
## phy_tree()    Phylogenetic Tree: [ 2102 tips and 2100 internal nodes ]

phyo1 = subset_taxa(phyo, !Order=="Chloroplast")
phyo2 = subset_taxa(phyo1, !Family=="Mitochondria")
phyo=phyo2
phyo

## phyloseq-class experiment-level object
## otu_table()   OTU Table:         [ 1921 taxa and 96 samples ]
## sample_data() Sample Data:       [ 96 samples by 10 sample variables ]
## tax_table()   Taxonomy Table:    [ 1921 taxa by 8 taxonomic ranks ]
## phy_tree()    Phylogenetic Tree: [ 1921 tips and 1919 internal nodes ]

Alpha Diversity

ASV Barplot

phyo_abund=transform_sample_counts(phyo, function(x) (x/sum(x)))
pd <- psmelt(phyo_abund)

colors=readRDS('/Users/oliviaahern/Documents/GitHub/Exp4/colors_asvs.rds')
library(grid)
#palette(as.character(t(colors)))
d_rgn = ggplot(pd, aes(x = reorder(Sample, Timepoint), y = Abundance, fill = Strain)) +
  scale_fill_manual(values=as.character(t(colors))) +
  geom_bar(stat = "identity", width=0.97, color='black',
           lwd=0.1) +
  facet_grid(~MC, scale='free_x', space="free", shrink=TRUE) +
  labs(x=" ", y = "ASV Relative Abundance") +
  theme_bw() +
  theme(axis.text = element_text(color ='black',size=12, hjust=1,vjust=1),
        axis.text.x=element_text(size=8, angle=90),
        axis.title = element_text(color='black',face='bold',size=14),
        legend.position = "none",
        panel.grid=element_blank(),
        strip.text.x = element_text(
          size = 10, color = "black", face = "bold"),
        strip.background = element_rect(
          color="white", fill="white", size=1, linetype="solid"),
        panel.spacing = unit(0.05, "lines"))

d_rgn

interactive ASV Barplot > 0.001%

Under construction

phyo_nop=subset_samples(phyo, B_C!='pond')

library(plyr)
# get abundance in %
phy <- transform_sample_counts(phyo_nop, function(x) x/sum(x))
# create dataframe from phyloseq object
dat <- psmelt(phy)
# convert Phylum to a character vector from a factor because R
dat$OTU <- as.character(dat$OTU)
# group dataframe by Phylum, calculate median rel. abundance
medians <- ddply(dat, ~OTU, function(x) c(median=median(x$Abundance)))
# find Phyla whose rel. abund. is less than 0.1%
remainder <- medians[medians$median <= 0.00001,]$OTU
# change their name to "Other"
dat[dat$OTU %in% remainder,]$OTU <- 'Other <0.1%'
# boxplot

blah=data.frame(tax_table(phyo_abund))
nan=cbind(row.names(blah), (colors))
nano = data.frame(nan)
colnames(nano) = c("OTU", "Colors")
subs=levels(as.factor(dat$OTU))
sub=subset(nano, OTU %in% subs)
color2=c(sub$Colors, 'gray80')


p_rgn = ggplot(dat, aes(x = reorder(Sample, Timepoint), y = Abundance, fill = OTU)) +
  scale_fill_manual(values=as.character(t((color2)))) +
  geom_bar(stat = "identity", width=0.97, color='black',
           lwd=0.1) +
  facet_grid(~MC, scale='free_x', space="free", shrink=TRUE) +
  labs(x=" ", y = "ASV Relative Abundance") +
  theme_bw() +
  theme(axis.text = element_text(color ='black',size=12, hjust=1,vjust=1),
        axis.text.x=element_text(size=8, angle=90),
        axis.title = element_text(color='black',face='bold',size=14),
        legend.position = "bottom",
        panel.grid=element_blank(),
        legend.text = element_text(size=6),
        legend.key.size = unit(0.25,'cm'),
        #strip.text.x = element_text(
        # size = 10, color = "black", face = "bold"),
        #strip.background = element_rect(
        # color="white", fill="white", size=1, linetype="solid"),
        #panel.spacing = unit(0.05, "lines")
  )
p_rgn

#library(plotly)
#fig <- ggplotly(p_rgn)
#fig

ASV Greater than 5%

x<-read.csv(file='/Users/oliviaahern/Documents/MBL_WHOI/Trophic_Cascades/Experiment4/Sequences/otu_tab_abund.csv',header=TRUE,row.names=1)
OTU = otu_table(x, taxa_are_rows=T)
k=c(0,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0,0.75,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0,0.75,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0,0.75,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0,0.75,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0,0.75,0,0,0,0,0,0.5,0,0,0,0,0,0,0,0)
c2=c('gray70','#4cc65a','#e78eb9','#4c902c','#87bb37','#914574','#886b2c','#bb6da1','#e273d2','#934993','#d4a771','#627037','#dd9f54','#e18c2b','#b344b8','#bf88da','#9662dc','#b17235','#9f4c28','#e68061','#82bf6f','#817bd6','#c5392e','#4b71e5','#4d65a5','#a3ae68','#df7f81','#48b1da','#4fc2b3','#52a27c','#a14d51','#d7408e','#e03e5d','#2b6f4d','#b6395d','#49c385','#b1b23a','#cca333','#3f8747')
legs=c('Other','Gammaproteobacteria RS62 marine group ASV 05c57','Bacteroidia Sphingobacteriales ASV 093af','Bacteroidia uncultured ASV 095f9','Gammaproteobacteria Marinomonas ASV 0be80','Alphaproteobacteria Rhizobium ASV 0d102','Gammaproteobacteria  ASV 0e8b3','Alphaproteobacteria Marivita ASV 0ed10','Verrucomicrobiae Diplosphaera ASV 1a969','Alphaproteobacteria Rhizobium ASV 2db5b','Gammaproteobacteria Methyloversatilis ASV 3cd78','Gammaproteobacteria Aeromonas ASV 3fd6c','Gammaproteobacteria Vibrio ASV 46b34','Alphaproteobacteria Hyphomonas ASV 67ca5','Bacteroidia Cryomorphaceae ASV 696c1','Gammaproteobacteria Hydrogenophaga ASV 6f94b','Gammaproteobacteria Methylotenera ASV 72ceb','Alphaproteobacteria Rhodobacteraceae ASV 7744d','Gammaproteobacteria Cellvibrio ASV 78ba2','Campylobacteria Arcobacter ASV 7b5c2','Alphaproteobacteria Rhodobacteraceae ASV 7e7d9','Alphaproteobacteria Azospirillum ASV 88fc6','Alphaproteobacteria Rhizobium ASV 923fc','Gammaproteobacteria Xanthomonadaceae ASV 96c75','Gammaproteobacteria Rhodocyclaceae ASV 9906c','Gammaproteobacteria Methylotenera ASV c4deb','Alphaproteobacteria Hyphomonas ASV c7d5a','Alphaproteobacteria  ASV c896f','Bacteroidia Cryomorphaceae ASV cae83','Alphaproteobacteria Pseudorhodobacter ASV daa79','Gammaproteobacteria Methylotenera ASV dfa40','Gammaproteobacteria Methylophilus ASV e96be','Gammaproteobacteria Zoogloea ASV efc35','Alphaproteobacteria Rhodobacteraceae ASV f19ba','Gammaproteobacteria Oceanobacter ASV f7e8d','Bacteroidia NS11-12 marine group ASV fbc54','Bacteroidia Candidatus Aquirestis ASV fbc59','Gammaproteobacteria Methylophilus ASV fc169','Campylobacteria Arcobacter ASV fe8ec')
par(mar=c(15,5,2,1))
barplot(OTU, las=2, cex.names=0.5, col=c2,space=k,
        ylab="ASV Relative Abundance")
box(which='plot')
legend(0,-12, ncol=3,
       bty='n',xpd=T, pch=22, pt.bg=c2, legend=legs,cex=0.6)

interactive Genera Barplot

Working on this plot

phyo_nop_g=tax_glom(phyo_nop, taxrank="Genus")


library(plyr)
# get abundance in %
phy <- transform_sample_counts(phyo_nop_g, function(x) x/sum(x))
# create dataframe from phyloseq object
dat <- psmelt(phy)
# convert Phylum to a character vector from a factor because R
dat$Genus <- as.character(dat$Genus)
dat$Genus[dat$Genus==""] <- NA

# group dataframe by Phylum, calculate median rel. abundance
medians <- ddply(dat, ~Genus, function(x) c(median=median(x$Abundance)))
# find Phyla whose rel. abund. is less than 0.1%
remainder <- medians[medians$median <= 0.00001,]$Genus
# change their name to "Other"
dat[dat$Genus %in% remainder,]$Genus <- 'Other <0.1%'
# boxplot

blah=data.frame(tax_table(phyo_abund))

nan=cbind(blah$Genus, (colors))
nano = data.frame(nan)
colnames(nano) = c("Genus", "Colors")
subs=levels(as.factor(dat$Genus))
sub=subset(nano, Genus %in% subs)
color4=c(sub$Colors, 'gray80')


p_rgn = ggplot(dat, aes(x = reorder(Sample, Timepoint), y = Abundance, fill = Genus)) +
  scale_fill_manual(values=as.character(t((color4)))) +
  geom_bar(stat = "identity", width=0.97, color='black',
           lwd=0.1) +
  facet_grid(~MC, scale='free_x', space="free", shrink=TRUE) +
  labs(x=" ", y = "Genus Relative Abundance") +
  theme_bw() +
  theme(axis.text = element_text(color ='black',size=12, hjust=1,vjust=1),
        axis.text.x=element_text(size=8, angle=90),
        axis.title = element_text(color='black',face='bold',size=14),
        legend.position = "bottom",
        panel.grid=element_blank(),
        legend.text = element_text(size=6),
        legend.key.size = unit(0.25, 'cm')
        #strip.text.x = element_text(
        # size = 10, color = "black", face = "bold"),
        #strip.background = element_rect(
        # color="white", fill="white", size=1, linetype="solid"),
        #panel.spacing = unit(0.05, "lines")
  )
p_rgn

#library(plotly)
#fig <- ggplotly(p_rgn)
#fig

Class Barplot

micro=microbiome::aggregate_taxa(phyo, "Class")

phyo_abund=transform_sample_counts(micro, function(x) (x/sum(x)))
pd <- psmelt(phyo_abund)

colors=readRDS("/Users/oliviaahern/Documents/GitHub/Exp4/c_class.rds")
library(grid)
#palette(as.character(t(colors)))
d_rgn = ggplot(pd, aes(x = reorder(Sample, Timepoint), y = Abundance, fill = Class)) +
  scale_fill_manual(values=as.character(t(colors))) +
  geom_bar(stat = "identity", width=0.97, color='black',
           lwd=0.1) +
  facet_grid(~MC, scale='free_x', space="free", shrink=TRUE) +
  labs(x=" ", y = "Class Relative Abundance") +
  theme_bw() +
  theme(axis.text = element_text(color ='black',size=12, hjust=1,vjust=1),
        axis.text.x=element_text(size=8, angle=90),
        axis.title = element_text(color='black',face='bold',size=14),
       legend.position = "bottom",
        panel.grid=element_blank(),
        strip.text.x = element_text(
          size = 10, color = "black", face = "bold"),
       legend.text = element_text(size=6),
        legend.key.size = unit(0.25, 'cm')
        #strip.background = element_rect(
        #  color="white", fill="white", size=1, linetype="solid"),
       # panel.spacing = unit(0.05, "lines"))
)
d_rgn

Some Stats

OTU=otu_table(phyo)

# calculate no. asvs
s=specnumber(t(OTU))

# calculate Pielou's evenness index 
H <- diversity(t(OTU))
J <- H/log(s)

{par(mar=c(4,4,1,1),mfrow=c(1,2))
b=barplot(s,las=2,horiz=T, col='gray50',xlab='No. ASVs', yaxt='n')
box(which='plot')
mtext(side=2, at=b, text=colnames(OTU),las=2,cex=0.5,adj=1.1)


barplot(J, las=2,horiz=T,yaxt='n', col='gray30',
        xlim=c(0,1),xlab="Pielous Index")
box(which='plot')
mtext(side=2, at=b, text=colnames(OTU),las=2,cex=0.5,adj=1.1)
}

Assessing alpha diversity using species number and Pielou’s Evenness Index (ranges from 0 - uneven to 1 totally even).

Beta Diversity

Aitchison’s Distance

Euclidean distance of centered log ratio transformed data

PCoA with Pond

Transform data - remove ASVs that are less than 0.01% of total dataset and minimum reads of 2. Aitchinson’s distance - Euclidean distance of centered log ratio data.

library(CoDaSeq)
library(compositions)
input=t(data.frame(otu_table(phyo)))
dim(input)

## [1]   96 1921

d.subset <- codaSeq.filter(input, 
                        samples.by.row=T,min.reads=2,min.prop =0.0001)

dim(d.subset)

## [1] 1145   96

log_rats <- (compositions::clr(t(d.subset)))
OTU=otu_table(t(log_rats),taxa_are_rows = T)
comp_clr=phyloseq(OTU,map,tax2)


otu=t(otu_table(comp_clr))
euc=vegdist(otu,'euc')
p=prcomp(euc)
# summary(p)
{
par(mar=c(7,8,1,10))
plot(p$x[,1],p$x[,2], pch = sample_data(comp_clr)$pch,
     bg=sample_data(comp_clr)$col,cex.lab=1.3,
     xlab= 'PCoA1 62.10%', ylab='PCoA2 13.71%',cex=1.5)
legend(60,60, legend=c("MC1-C12 Batch","MC1-C12 Chemostat",
                            "MC2-Met Batch", "MC2-Met Chemostat",
                            "MC3-Eth Batch", "MC3-Eth Chemostat",
                            "MC4-Ace Batch", "MC4-Ace Chemostat",
                            "MC5-Glu Batch", "MC5-Glu Chemostat",
                            "MC6-Xyl Batch", "MC6-Xyl Chemostat",
                            "Pond"),xpd=T,
       pt.bg=c("gray70","gray70","#a44f9a","#a44f9a","#6870c8","#6870c8",
             "#56ae6c","#56ae6c","#af953c","#af953c","#ba4a4f","#ba4a4f",
             "black"),
       pch=c(21,23,21,23,21,23,21,23,21,23,21,23, 24),
       bty='n',cex=1)
ordiellipse(p, groups=sample_data(comp_clr)$Timepoint)
}

PCoA no Pond

Transform data - remove ASVs that are less than 0.01% of total dataset and minimum reads of 2. Aitchinson’s distance - Euclidean distance of centered log ratio data.

Variables influencing distance matrix:

• Treatment (AKA MC) R2 = 0.07573, F = 1.7734, p =0.007
• Timepoint R2 = 0.01842, F = 2.1569, p = 0.038
• Batch or Chemostat R2 = 0.04348, F = 3.4599, p = 0.007
• POC R2 = 0.05118, F = 5.5874, p = 0.001
• Atomic %13C R2 = 0.02144, F = 2.3410, p = 0.027

data1=subset_samples(phyo, Treatment !="Pond")
input=t(data.frame(otu_table(data1)))
dim(input)

## [1]   94 1921

d.subset <- codaSeq.filter(input, 
                           samples.by.row=T,min.reads=2,min.prop =0.00001)

dim(d.subset)

## [1] 1326   94

log_rats <- (compositions::clr(t(d.subset)))
OTU=otu_table(t(log_rats),taxa_are_rows = T)
comp_clr=phyloseq(OTU,map,tax2)


otu=t(otu_table(comp_clr))
euc=vegdist(otu,'euc')
p=prcomp(euc)
#summary(p)
{
par(mar=c(7,8,1,10))
plot(p$x[,1],p$x[,2], pch = sample_data(data1)$pch,
     bg=sample_data(data1)$col,cex.lab=1.3,
     xlab= 'PCoA1 63.61%', ylab='PCoA2 12.26%',cex=1.5,
     yaxt='n',xaxt='n')
  axis(2, at = c(-40,-20,0,20,40,60))
  axis(1,at=c(-80,-40,0,40))
legend(60,40, legend=c("MC1-C12 Batch","MC1-C12 Chemostat",
                            "MC2-Met Batch", "MC2-Met Chemostat",
                            "MC3-Eth Batch", "MC3-Eth Chemostat",
                            "MC4-Ace Batch", "MC4-Ace Chemostat",
                            "MC5-Glu Batch", "MC5-Glu Chemostat",
                            "MC6-Xyl Batch", "MC6-Xyl Chemostat"),xpd=T,
       pt.bg=c("gray70","gray70","#a44f9a","#a44f9a","#6870c8","#6870c8",
             "#56ae6c","#56ae6c","#af953c","#af953c","#ba4a4f","#ba4a4f"),
       pch=c(21,23,21,23,21,23,21,23,21,23,21,23),
       bty='n',cex=1)
ordiellipse(p, groups=sample_data(comp_clr)$Timepoint)
}

sub=subset_samples(comp_clr, POC !="NA")

otu=t(otu_table(sub))
euc=vegdist(otu,'euc')
set.seed(1234)
adonis2(euc~ sample_data(sub)$Treatment + sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, by='margin', permutations = 9999)

## Permutation test for adonis under reduced model
## Marginal effects of terms
## Permutation: free
## Number of permutations: 9999
## 
## adonis2(formula = euc ~ sample_data(sub)$Treatment + sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, permutations = 9999, by = "margin")
##                            Df SumOfSqs      R2      F Pr(>F)    
## sample_data(sub)$Treatment  5   2209.8 0.07555 1.6902 0.0060 ** 
## sample_data(sub)$Timepoint  1    535.7 0.01831 2.0488 0.0351 *  
## sample_data(sub)$B_C        1    831.9 0.02844 3.1816 0.0031 ** 
## sample_data(sub)$POC        1   1078.2 0.03686 4.1232 0.0005 ***
## sample_data(sub)$Atomic_C   1    717.5 0.02453 2.7441 0.0082 ** 
## Residual                   62  16212.1 0.55424                  
## Total                      71  29251.0 1.00000                  
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

#adonis2(euc~  sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, by='margin', permutations = 9999, strata=sample_data(sub)$Treatment)

Batch PCoA

Ellipses represent 80% confidence intervals around the centroid of the Timepoint.

Data is significantly tied to the timepoint sampled (adonis2, R2=0.23, F=9.4, p<0.001) not the Treatment/MC (adonis2, R2=0.08, F=0.7, p=0.973).

data1=subset_samples(comp_clr, B_C =="Batch")
otu=t(otu_table(data1))
euc=vegdist(otu,'euc')

p=prcomp(euc)
#summary(p)
{
  par(mar=c(7,8,1,10))
  plot(p$x[,1],p$x[,2], pch = sample_data(data1)$pch,
       bg=sample_data(data1)$col,cex.lab=1.3,
       xlab= 'PCoA1 54.63%', ylab='PCoA2 14.00%',cex=1.5)
  ordiellipse(p, groups=sample_data(data1)$Timepoint,
              label=FALSE)

  legend(40,5, legend=c("MC1-C12 Batch",
                            "MC2-Met Batch", 
                            "MC3-Eth Batch",
                            "MC4-Ace Batch", 
                            "MC5-Glu Batch", 
                            "MC6-Xyl Batch"),xpd=T,
       pt.bg=c("gray70","#a44f9a","#6870c8",
             "#56ae6c","#af953c","#ba4a4f"),
       pch=21,
       bty='n',cex=1)
}

adonis2(euc~sample_data(data1)$Timepoint + sample_data(data1)$Treatment + sample_data(data1)$POC + sample_data(data1)$Atomic_C,
        by='margin', perm=999)

## Permutation test for adonis under reduced model
## Marginal effects of terms
## Permutation: free
## Number of permutations: 999
## 
## adonis2(formula = euc ~ sample_data(data1)$Timepoint + sample_data(data1)$Treatment + sample_data(data1)$POC + sample_data(data1)$Atomic_C, permutations = 999, by = "margin")
##                              Df SumOfSqs      R2      F Pr(>F)    
## sample_data(data1)$Timepoint  1   1647.7 0.12289 6.3448  0.001 ***
## sample_data(data1)$Treatment  5   1343.5 0.10020 1.0347  0.395    
## sample_data(data1)$POC        1   1490.0 0.11113 5.7374  0.001 ***
## sample_data(data1)$Atomic_C   1    183.6 0.01370 0.7071  0.718    
## Residual                     27   7011.8 0.52297                  
## Total                        35  13407.5 1.00000                  
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Chemostat PCoA

Ellipses represent 80% confidence intervals around the centroid of the Treatment.

Chemostat data is significantly associated with both Timepoint (adonis2, R2=0.06, F=5.5, p<0.001) and Treatment/MC (adonis2, R2=0.39, F=6.8, p<0.001).

data1=subset_samples(comp_clr, B_C =="Chemostat")
otu=t(otu_table(data1))
euc=vegdist(otu,'euc')

p=prcomp(euc)
#summary(p)
{
  par(mar=c(7,8,1,10))
  plot(p$x[,1],p$x[,2], pch = sample_data(data1)$pch,
       bg=sample_data(data1)$col,cex.lab=1.3,
       xlab= 'PCoA1 34.58%', ylab='PCoA2 15.20%',cex=1.5)
  ordiellipse(p, groups=sample_data(data1)$Treatment,label=TRUE)
legend(43,5, legend=c("MC1-C12 Chemostat",
                            "MC2-Met Chemostat", 
                            "MC3-Eth Chemostat",
                            "MC4-Ace Chemostat", 
                            "MC5-Glu Chemostat", 
                            "MC6-Xyl Chemostat"),xpd=T,
       pt.bg=c("gray70","#a44f9a","#6870c8",
             "#56ae6c","#af953c","#ba4a4f"),
       pch=23,
       bty='n',cex=1)
}


adonis2(euc~sample_data(data1)$Timepoint + sample_data(data1)$Treatment + sample_data(data1)$POC + sample_data(data1)$Atomic_C,
        by='margin', perm=999)
anosim(euc, sample_data(data1)$Timepoint)

Phylogenetic Distance (philr)

PCoA with Pond

library(philr)
# filter low abudnace
library(CoDaSeq)
library(compositions)
input=t(data.frame(otu_table(phyo)))
dim(input)

## [1]   96 1921

d.subset <- codaSeq.filter(input, 
                        samples.by.row=T,min.reads=2,min.prop =0.0001)

dim(d.subset)

## [1] 1145   96

log_rats <- (compositions::clr(t(d.subset)))
OTU=otu_table(t(log_rats),taxa_are_rows = T)
comp_clr=phyloseq(OTU,map,tax2)

tax=data.frame(tax_table(comp_clr))
otus=tax$Strain
my_subset <- subset(otu_table(phyo), rownames(otu_table(phyo)) %in% otus)
new_physeq <- merge_phyloseq(my_subset, tax_table(phyo), sample_data(phyo), phy_tree(phyo))


GP <- transform_sample_counts(new_physeq, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

## [1] "Strain_31041e0311df2ecb7962b142422de261/Kingdom_Bacteria"

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')


gp.dist <- dist(gp.philr, method="euclidean")
p <- prcomp(gp.dist)




{
par(mar=c(7,8,1,10))
plot(p$x[,1],p$x[,2], pch = sample_data(phyo)$pch,
     bg=sample_data(phyo)$col,cex.lab=1.3,
     xlab= 'PCoA1 78.92%', ylab='PCoA2 9.00%',cex=1.5)
legend(80,45, legend=c("MC1-C12 Batch","MC1-C12 Chemostat",
                            "MC2-Met Batch", "MC2-Met Chemostat",
                            "MC3-Eth Batch", "MC3-Eth Chemostat",
                            "MC4-Ace Batch", "MC4-Ace Chemostat",
                            "MC5-Glu Batch", "MC5-Glu Chemostat",
                            "MC6-Xyl Batch", "MC6-Xyl Chemostat",
                            "Pond"),xpd=T,
       pt.bg=c("gray70","gray70","#a44f9a","#a44f9a","#6870c8","#6870c8",
             "#56ae6c","#56ae6c","#af953c","#af953c","#ba4a4f","#ba4a4f",
             "black"),
       pch=c(21,23,21,23,21,23,21,23,21,23,21,23, 24),
       bty='n',cex=1)
}

PCoA no Pond

Samples significantly tied to

• Treatment (aka MC) R2 = 0.06269, F = 2.6671, p = 0.007
• Timepoint R2 = 0.01441, F = 3.0641, p = 0.046
• Batch or Chemostat R2 = 0.02973, F = 6.3246, p = 0.005
• POC (uM) R2 = 0.01730, F = 3.6802, p = 0.027
• Atomic %13C R2 = 0.02860, F = 6.0829, p = 0.004

phyo1=subset_samples(phyo, B_C !="Pond")
input=t(data.frame(otu_table(phyo1)))
dim(input)

## [1]   90 1921

d.subset <- codaSeq.filter(input, 
                        samples.by.row=T,min.reads=2,min.prop =0.00001)

dim(d.subset)

## [1] 1272   90

log_rats <- (compositions::clr(t(d.subset)))
OTU=otu_table(t(log_rats),taxa_are_rows = T)
comp_clr=phyloseq(OTU,map,tax2)

tax=data.frame(tax_table(comp_clr))
otus=tax$Strain
my_subset <- subset(otu_table(phyo1), rownames(otu_table(phyo1)) %in% otus)
new_physeq <- merge_phyloseq(my_subset, tax_table(phyo1), sample_data(phyo1), phy_tree(phyo1))




GP <- transform_sample_counts(new_physeq, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

## [1] "Species_/Kingdom_Bacteria"

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')


gp.dist <- dist(gp.philr, method="euclidean")
p <- prcomp(gp.dist)




{
par(mar=c(7,8,1,10))
plot(p$x[,1],p$x[,2], pch = sample_data(phyo1)$pch,
     bg=sample_data(phyo1)$col,cex.lab=1.3,
     xlab= 'PCoA1 77.59%', ylab='PCoA2 10.00%',cex=1.5)
legend(120,45, legend=c("MC1-C12 Batch","MC1-C12 Chemostat",
                            "MC2-Met Batch", "MC2-Met Chemostat",
                            "MC3-Eth Batch", "MC3-Eth Chemostat",
                            "MC4-Ace Batch", "MC4-Ace Chemostat",
                            "MC5-Glu Batch", "MC5-Glu Chemostat",
                            "MC6-Xyl Batch", "MC6-Xyl Chemostat"),xpd=T,
       pt.bg=c("gray70","gray70","#a44f9a","#a44f9a","#6870c8","#6870c8",
             "#56ae6c","#56ae6c","#af953c","#af953c","#ba4a4f","#ba4a4f"),
       pch=c(21,23,21,23,21,23,21,23,21,23,21,23),
       bty='n',cex=1)
ordiellipse(p, groups=sample_data(phyo1)$Timepoint)
}

sub=subset_samples(phyo1, POC!="NA")
GP <- transform_sample_counts(sub, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

## [1] "Species_/Kingdom_Bacteria"

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')
gp.dist <- dist(gp.philr, method="euclidean")

set.seed(1234)
adonis2(gp.dist~ sample_data(sub)$Treatment + sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, by='margin', permutations = 999)

## Permutation test for adonis under reduced model
## Marginal effects of terms
## Permutation: free
## Number of permutations: 999
## 
## adonis2(formula = gp.dist ~ sample_data(sub)$Treatment + sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, permutations = 999, by = "margin")
##                            Df SumOfSqs      R2      F Pr(>F)   
## sample_data(sub)$Treatment  5    959.0 0.06269 2.6671  0.007 **
## sample_data(sub)$Timepoint  1    220.3 0.01441 3.0641  0.046 * 
## sample_data(sub)$B_C        1    454.8 0.02973 6.3246  0.005 **
## sample_data(sub)$POC        1    264.6 0.01730 3.6802  0.027 * 
## sample_data(sub)$Atomic_C   1    437.4 0.02860 6.0829  0.004 **
## Residual                   62   4458.5 0.29147                 
## Total                      71  15296.5 1.00000                 
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

# adonis2(formula = gp.dist ~ sample_data(sub)$Timepoint + sample_data(sub)$B_C + sample_data(sub)$POC + sample_data(sub)$Atomic_C, permutations = 999, by = "margin", strata = sample_data(sub)$Treatment)

Batch PCoA

Samples significantly tied to

• Treatment (aka MC) R2 = 0.04936, F = 0.7705, p = 0.710
• Timepoint R2 = 0.11537, F = 9.0043, p = 0.002
• POC (uM) R2 = 0.25811, F = 20.1457, p = 0.001
• Atomic %13C R2 = 0.01423, F = 1.1105, p = 0.333

phyo1=subset_samples(new_physeq, B_C =="Batch")

GP <- transform_sample_counts(phyo1, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

## [1] "Species_/Kingdom_Bacteria"

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')


gp.dist <- dist(gp.philr, method="euclidean")
p <- prcomp(gp.dist)




{
  par(mar=c(7,8,1,10))
  plot(p$x[,1],p$x[,2], pch = sample_data(phyo1)$pch,
       bg=sample_data(phyo1)$col,cex.lab=1.3,
       xlab= 'PCoA1 62.21%', ylab='PCoA2 19.91%',cex=1.5)
  ordiellipse(p, groups=sample_data(phyo1)$Timepoint,
              label=TRUE, cex=1.5)

  legend(90,20, legend=c("MC1-C12 Batch",
                            "MC2-Met Batch", 
                            "MC3-Eth Batch",
                            "MC4-Ace Batch", 
                            "MC5-Glu Batch", 
                            "MC6-Xyl Batch"),xpd=T,
       pt.bg=c("gray70","#a44f9a","#6870c8",
             "#56ae6c","#af953c","#ba4a4f"),
       pch=21,
       bty='n',cex=1)
}

set.seed(1234)
adonis2(gp.dist~ sample_data(phyo1)$Treatment + sample_data(phyo1)$Timepoint + sample_data(phyo1)$POC + sample_data(phyo1)$Atomic_C, by='margin', permutations = 999)

## Permutation test for adonis under reduced model
## Marginal effects of terms
## Permutation: free
## Number of permutations: 999
## 
## adonis2(formula = gp.dist ~ sample_data(phyo1)$Treatment + sample_data(phyo1)$Timepoint + sample_data(phyo1)$POC + sample_data(phyo1)$Atomic_C, permutations = 999, by = "margin")
##                              Df SumOfSqs      R2       F Pr(>F)    
## sample_data(phyo1)$Treatment  5   1016.8 0.05178  0.8473  0.615    
## sample_data(phyo1)$Timepoint  1   1974.2 0.10053  8.2250  0.002 ** 
## sample_data(phyo1)$POC        1   5464.1 0.27823 22.7652  0.001 ***
## sample_data(phyo1)$Atomic_C   1    289.4 0.01473  1.2056  0.282    
## Residual                     27   6480.6 0.32999                   
## Total                        35  19638.7 1.00000                   
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Chemostat PCoA

Samples significantly tied to

• Timepoint R2 = 0.07368, F = 3.2076, p = 0.021
• Treatment (AKA MC) R2 = 0.12729, F = 1.1083, p = 0.362
• POC (uM) R2 = 0.01347, F = 0.5866, p = 0.603
• Atomic %13C R2 = 0.13386, F = 5.8276, p = 0.003

phyo1=subset_samples(new_physeq, B_C =="Chemostat")

GP <- transform_sample_counts(phyo1, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')


gp.dist <- dist(gp.philr, method="euclidean")
p <- prcomp(gp.dist)

{
  par(mar=c(7,8,1,10))
  plot(p$x[,1],p$x[,2], pch = sample_data(data1)$pch,
       bg=sample_data(data1)$col,cex.lab=1.3,
       xlab= 'PCoA1 62.23%', ylab='PCoA2 17.52%',cex=1.5)
  ordiellipse(p, groups=sample_data(data1)$Treatment,label=TRUE)
legend(180,50, legend=c("MC1-C12 Chemostat",
                            "MC2-Met Chemostat", 
                            "MC3-Eth Chemostat",
                            "MC4-Ace Chemostat", 
                            "MC5-Glu Chemostat", 
                            "MC6-Xyl Chemostat"),xpd=T,
       pt.bg=c("gray70","#a44f9a","#6870c8",
             "#56ae6c","#af953c","#ba4a4f"),
       pch=23,
       bty='n',cex=1)
}


sub=subset_samples(phyo1, POC!="NA")
GP <- transform_sample_counts(sub, function(x) x+1)
phy_tree(GP) <- makeNodeLabel(phy_tree(GP), method="number", prefix='n')
name.balance(phy_tree(GP), tax_table(GP), 'n1')

otu.table <- t(otu_table(GP))
treefr <- phy_tree(GP)
metadata <- sample_data(GP)
tax <- tax_table(GP)

gp.philr <- philr(otu.table, treefr, 
                  part.weights='enorm.x.gm.counts', 
                  ilr.weights='blw.sqrt')
gp.dist <- dist(gp.philr, method="euclidean")
set.seed(1234)
adonis2(gp.dist~ sample_data(sub)$Treatment + sample_data(sub)$Timepoint + sample_data(sub)$POC + sample_data(sub)$Atomic_C, by='margin', permutations = 999)